1 /* SPDX-License-Identifier: GPL-2.0 */ 2 #ifndef __ASM_S390_PCI_H 3 #define __ASM_S390_PCI_H 4 5 #include <linux/pci.h> 6 #include <linux/mutex.h> 7 #include <linux/iommu.h> 8 #include <asm-generic/pci.h> 9 #include <asm/pci_clp.h> 10 #include <asm/pci_debug.h> 11 #include <asm/sclp.h> 12 13 #define PCIBIOS_MIN_IO 0x1000 14 #define PCIBIOS_MIN_MEM 0x10000000 15 16 #define pcibios_assign_all_busses() (0) 17 18 void __iomem *pci_iomap(struct pci_dev *, int, unsigned long); 19 void pci_iounmap(struct pci_dev *, void __iomem *); 20 int pci_domain_nr(struct pci_bus *); 21 int pci_proc_domain(struct pci_bus *); 22 23 #define ZPCI_BUS_NR 0 /* default bus number */ 24 #define ZPCI_DEVFN 0 /* default device number */ 25 26 #define ZPCI_NR_DMA_SPACES 1 27 #define ZPCI_NR_DEVICES CONFIG_PCI_NR_FUNCTIONS 28 29 /* PCI Function Controls */ 30 #define ZPCI_FC_FN_ENABLED 0x80 31 #define ZPCI_FC_ERROR 0x40 32 #define ZPCI_FC_BLOCKED 0x20 33 #define ZPCI_FC_DMA_ENABLED 0x10 34 35 #define ZPCI_FMB_DMA_COUNTER_VALID (1 << 23) 36 37 struct zpci_fmb_fmt0 { 38 u64 dma_rbytes; 39 u64 dma_wbytes; 40 }; 41 42 struct zpci_fmb_fmt1 { 43 u64 rx_bytes; 44 u64 rx_packets; 45 u64 tx_bytes; 46 u64 tx_packets; 47 }; 48 49 struct zpci_fmb_fmt2 { 50 u64 consumed_work_units; 51 u64 max_work_units; 52 }; 53 54 struct zpci_fmb_fmt3 { 55 u64 tx_bytes; 56 }; 57 58 struct zpci_fmb { 59 u32 format : 8; 60 u32 fmt_ind : 24; 61 u32 samples; 62 u64 last_update; 63 /* common counters */ 64 u64 ld_ops; 65 u64 st_ops; 66 u64 stb_ops; 67 u64 rpcit_ops; 68 /* format specific counters */ 69 union { 70 struct zpci_fmb_fmt0 fmt0; 71 struct zpci_fmb_fmt1 fmt1; 72 struct zpci_fmb_fmt2 fmt2; 73 struct zpci_fmb_fmt3 fmt3; 74 }; 75 } __packed __aligned(128); 76 77 enum zpci_state { 78 ZPCI_FN_STATE_STANDBY = 0, 79 ZPCI_FN_STATE_CONFIGURED = 1, 80 ZPCI_FN_STATE_RESERVED = 2, 81 ZPCI_FN_STATE_ONLINE = 3, 82 }; 83 84 struct zpci_bar_struct { 85 struct resource *res; /* bus resource */ 86 void __iomem *mio_wb; 87 void __iomem *mio_wt; 88 u32 val; /* bar start & 3 flag bits */ 89 u16 map_idx; /* index into bar mapping array */ 90 u8 size; /* order 2 exponent */ 91 }; 92 93 struct s390_domain; 94 95 /* Private data per function */ 96 struct zpci_dev { 97 struct pci_bus *bus; 98 struct list_head entry; /* list of all zpci_devices, needed for hotplug, etc. */ 99 100 enum zpci_state state; 101 u32 fid; /* function ID, used by sclp */ 102 u32 fh; /* function handle, used by insn's */ 103 u16 vfn; /* virtual function number */ 104 u16 pchid; /* physical channel ID */ 105 u8 pfgid; /* function group ID */ 106 u8 pft; /* pci function type */ 107 u16 domain; 108 109 struct mutex lock; 110 u8 pfip[CLP_PFIP_NR_SEGMENTS]; /* pci function internal path */ 111 u32 uid; /* user defined id */ 112 u8 util_str[CLP_UTIL_STR_LEN]; /* utility string */ 113 114 /* IRQ stuff */ 115 u64 msi_addr; /* MSI address */ 116 unsigned int max_msi; /* maximum number of MSI's */ 117 unsigned int msi_first_bit; 118 unsigned int msi_nr_irqs; 119 struct airq_iv *aibv; /* adapter interrupt bit vector */ 120 unsigned long aisb; /* number of the summary bit */ 121 122 /* DMA stuff */ 123 unsigned long *dma_table; 124 spinlock_t dma_table_lock; 125 int tlb_refresh; 126 127 spinlock_t iommu_bitmap_lock; 128 unsigned long *iommu_bitmap; 129 unsigned long *lazy_bitmap; 130 unsigned long iommu_size; 131 unsigned long iommu_pages; 132 unsigned int next_bit; 133 134 struct iommu_device iommu_dev; /* IOMMU core handle */ 135 136 char res_name[16]; 137 bool mio_capable; 138 struct zpci_bar_struct bars[PCI_STD_NUM_BARS]; 139 140 u64 start_dma; /* Start of available DMA addresses */ 141 u64 end_dma; /* End of available DMA addresses */ 142 u64 dma_mask; /* DMA address space mask */ 143 144 /* Function measurement block */ 145 struct zpci_fmb *fmb; 146 u16 fmb_update; /* update interval */ 147 u16 fmb_length; 148 /* software counters */ 149 atomic64_t allocated_pages; 150 atomic64_t mapped_pages; 151 atomic64_t unmapped_pages; 152 153 enum pci_bus_speed max_bus_speed; 154 155 struct dentry *debugfs_dev; 156 157 struct s390_domain *s390_domain; /* s390 IOMMU domain data */ 158 }; 159 160 static inline bool zdev_enabled(struct zpci_dev *zdev) 161 { 162 return (zdev->fh & (1UL << 31)) ? true : false; 163 } 164 165 extern const struct attribute_group *zpci_attr_groups[]; 166 extern unsigned int s390_pci_force_floating __initdata; 167 168 /* ----------------------------------------------------------------------------- 169 Prototypes 170 ----------------------------------------------------------------------------- */ 171 /* Base stuff */ 172 int zpci_create_device(struct zpci_dev *); 173 void zpci_remove_device(struct zpci_dev *zdev); 174 int zpci_enable_device(struct zpci_dev *); 175 int zpci_disable_device(struct zpci_dev *); 176 int zpci_register_ioat(struct zpci_dev *, u8, u64, u64, u64); 177 int zpci_unregister_ioat(struct zpci_dev *, u8); 178 void zpci_remove_reserved_devices(void); 179 180 /* CLP */ 181 int clp_scan_pci_devices(void); 182 int clp_rescan_pci_devices(void); 183 int clp_rescan_pci_devices_simple(void); 184 int clp_add_pci_device(u32, u32, int); 185 int clp_enable_fh(struct zpci_dev *, u8); 186 int clp_disable_fh(struct zpci_dev *); 187 int clp_get_state(u32 fid, enum zpci_state *state); 188 189 /* IOMMU Interface */ 190 int zpci_init_iommu(struct zpci_dev *zdev); 191 void zpci_destroy_iommu(struct zpci_dev *zdev); 192 193 #ifdef CONFIG_PCI 194 static inline bool zpci_use_mio(struct zpci_dev *zdev) 195 { 196 return static_branch_likely(&have_mio) && zdev->mio_capable; 197 } 198 199 /* Error handling and recovery */ 200 void zpci_event_error(void *); 201 void zpci_event_availability(void *); 202 void zpci_rescan(void); 203 bool zpci_is_enabled(void); 204 #else /* CONFIG_PCI */ 205 static inline void zpci_event_error(void *e) {} 206 static inline void zpci_event_availability(void *e) {} 207 static inline void zpci_rescan(void) {} 208 #endif /* CONFIG_PCI */ 209 210 #ifdef CONFIG_HOTPLUG_PCI_S390 211 int zpci_init_slot(struct zpci_dev *); 212 void zpci_exit_slot(struct zpci_dev *); 213 #else /* CONFIG_HOTPLUG_PCI_S390 */ 214 static inline int zpci_init_slot(struct zpci_dev *zdev) 215 { 216 return 0; 217 } 218 static inline void zpci_exit_slot(struct zpci_dev *zdev) {} 219 #endif /* CONFIG_HOTPLUG_PCI_S390 */ 220 221 /* Helpers */ 222 static inline struct zpci_dev *to_zpci(struct pci_dev *pdev) 223 { 224 return pdev->sysdata; 225 } 226 227 struct zpci_dev *get_zdev_by_fid(u32); 228 229 /* DMA */ 230 int zpci_dma_init(void); 231 void zpci_dma_exit(void); 232 233 int __init zpci_irq_init(void); 234 void __init zpci_irq_exit(void); 235 236 /* FMB */ 237 int zpci_fmb_enable_device(struct zpci_dev *); 238 int zpci_fmb_disable_device(struct zpci_dev *); 239 240 /* Debug */ 241 int zpci_debug_init(void); 242 void zpci_debug_exit(void); 243 void zpci_debug_init_device(struct zpci_dev *, const char *); 244 void zpci_debug_exit_device(struct zpci_dev *); 245 void zpci_debug_info(struct zpci_dev *, struct seq_file *); 246 247 /* Error reporting */ 248 int zpci_report_error(struct pci_dev *, struct zpci_report_error_header *); 249 250 #ifdef CONFIG_NUMA 251 252 /* Returns the node based on PCI bus */ 253 static inline int __pcibus_to_node(const struct pci_bus *bus) 254 { 255 return NUMA_NO_NODE; 256 } 257 258 static inline const struct cpumask * 259 cpumask_of_pcibus(const struct pci_bus *bus) 260 { 261 return cpu_online_mask; 262 } 263 264 #endif /* CONFIG_NUMA */ 265 266 #endif 267